A population analysis of pulse broadening in ASKAP fast radio bursts
The pulse morphology of fast radio bursts (FRBs) provides key information in both understanding progenitor physics and the plasma medium through which the burst propagates. We present a study of the profiles of 33 bright FRBs detected by the Australian Square Kilometre Array Pathfinder. We identify...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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OXFORD UNIV PRESS
2020
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| Subjects: | |
| Online Access: | http://purl.org/au-research/grants/arc/DP180100857 http://hdl.handle.net/20.500.11937/91558 |
| _version_ | 1848765547290820608 |
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| author | Qiu, H. Shannon, Ryan Farah, W. Macquart, Jean-Pierre Deller, A.T. Bannister, K.W. James, Clancy Flynn, C. Day, C.K. Bhandari, S. Murphy, T. |
| author_facet | Qiu, H. Shannon, Ryan Farah, W. Macquart, Jean-Pierre Deller, A.T. Bannister, K.W. James, Clancy Flynn, C. Day, C.K. Bhandari, S. Murphy, T. |
| author_sort | Qiu, H. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The pulse morphology of fast radio bursts (FRBs) provides key information in both understanding progenitor physics and the plasma medium through which the burst propagates. We present a study of the profiles of 33 bright FRBs detected by the Australian Square Kilometre Array Pathfinder. We identify seven FRBs with measureable intrinsic pulse widths, including two FRBs that have been seen to repeat. In our modest sample, we see no evidence for bimodality in the pulse width distribution. We also identify five FRBs with evidence of millisecond time-scale pulse broadening caused by scattering in inhomogeneous plasma. We find no evidence for a relationship between pulse broadening and extragalactic dispersion measure. The scattering could be either caused by extreme turbulence in the host galaxy or chance propagation through foreground galaxies. With future high time resolution observations and detailed study of host galaxy properties, we may be able to probe line-of-sight turbulence on gigaparsec scales. |
| first_indexed | 2025-11-14T11:36:59Z |
| format | Journal Article |
| id | curtin-20.500.11937-91558 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:36:59Z |
| publishDate | 2020 |
| publisher | OXFORD UNIV PRESS |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-915582023-05-11T03:41:58Z A population analysis of pulse broadening in ASKAP fast radio bursts Qiu, H. Shannon, Ryan Farah, W. Macquart, Jean-Pierre Deller, A.T. Bannister, K.W. James, Clancy Flynn, C. Day, C.K. Bhandari, S. Murphy, T. Science & Technology Physical Sciences Astronomy & Astrophysics methods: data analysis intergalactic medium galaxies: ISM fast radio bursts SKY astro-ph.HE astro-ph.HE astro-ph.CO The pulse morphology of fast radio bursts (FRBs) provides key information in both understanding progenitor physics and the plasma medium through which the burst propagates. We present a study of the profiles of 33 bright FRBs detected by the Australian Square Kilometre Array Pathfinder. We identify seven FRBs with measureable intrinsic pulse widths, including two FRBs that have been seen to repeat. In our modest sample, we see no evidence for bimodality in the pulse width distribution. We also identify five FRBs with evidence of millisecond time-scale pulse broadening caused by scattering in inhomogeneous plasma. We find no evidence for a relationship between pulse broadening and extragalactic dispersion measure. The scattering could be either caused by extreme turbulence in the host galaxy or chance propagation through foreground galaxies. With future high time resolution observations and detailed study of host galaxy properties, we may be able to probe line-of-sight turbulence on gigaparsec scales. 2020 Journal Article http://hdl.handle.net/20.500.11937/91558 10.1093/mnras/staa1916 English http://purl.org/au-research/grants/arc/DP180100857 http://purl.org/au-research/grants/arc/FT190100155 http://purl.org/au-research/grants/arc/FT150100415 http://purl.org/au-research/grants/arc/FT150100099 OXFORD UNIV PRESS fulltext |
| spellingShingle | Science & Technology Physical Sciences Astronomy & Astrophysics methods: data analysis intergalactic medium galaxies: ISM fast radio bursts SKY astro-ph.HE astro-ph.HE astro-ph.CO Qiu, H. Shannon, Ryan Farah, W. Macquart, Jean-Pierre Deller, A.T. Bannister, K.W. James, Clancy Flynn, C. Day, C.K. Bhandari, S. Murphy, T. A population analysis of pulse broadening in ASKAP fast radio bursts |
| title | A population analysis of pulse broadening in ASKAP fast radio bursts |
| title_full | A population analysis of pulse broadening in ASKAP fast radio bursts |
| title_fullStr | A population analysis of pulse broadening in ASKAP fast radio bursts |
| title_full_unstemmed | A population analysis of pulse broadening in ASKAP fast radio bursts |
| title_short | A population analysis of pulse broadening in ASKAP fast radio bursts |
| title_sort | population analysis of pulse broadening in askap fast radio bursts |
| topic | Science & Technology Physical Sciences Astronomy & Astrophysics methods: data analysis intergalactic medium galaxies: ISM fast radio bursts SKY astro-ph.HE astro-ph.HE astro-ph.CO |
| url | http://purl.org/au-research/grants/arc/DP180100857 http://purl.org/au-research/grants/arc/DP180100857 http://purl.org/au-research/grants/arc/DP180100857 http://purl.org/au-research/grants/arc/DP180100857 http://hdl.handle.net/20.500.11937/91558 |